Muataa Malek Collection :: Book Number 9
9.9.9.35
Yahya related to me from Malik from Ibn Shihab that Ubaydullah ibn Abdullah ibn Utba said, "I visited Umar ibn al-Khattab just before noon and found him praying a voluntary prayer. So I stood behind him, but he pulled me nearer and put me next to him, on his right hand side, and then Yarfa came and I moved back and we formed a row behind him."